Synthesis of Ni sub(2P promoted trimetallic NiMoW/[gamma]-Al) sub(2)O sub(3 catalysts for diesel oil hydrotreatment)

• Published in: Journal of natural gas chemistry 2011-03, Vol.20 (2), p.117-122
• Main Authors: Lan, Ling, Ge, Shaohui, Liu, Kunhong, Hou, Yuandong, Bao, Xiaojun
• Format: Article
• Language: English
• Subjects: Catalysis; Catalysts; Diesel; Diesel fuels; Drift; Natural gas; Nickel; Reflectance
• ISSN: 1003-9953
• DOI: 10.1016/S1003-9953(10)60173-9

The Ni sub(2P promoted and [gamma]-Al) sub(2)O sub(3 supported NiMoW sulfide catalyst consisting of 4 wt% Mo, 22 wt% W, 2 wt% Ni and 2.5 wt% Ni) sub(2)P was synthesized by a co-impregnation method. The catalysts were characterized by N sub(2 adsorption-desorption, X-ray diffraction (XRD), diffuse reflectance infrared Fourier transform (DRIFT) spectroscopy, NH) sub(3) temperature-programmed desorption (NH sub(3-TPD) and transmission electron microscopy (TEM). The results showed that Ni) sub(2)P, Ni, Mo and W species were highly dispersed over [gamma]-Al sub(2O) sub(3). The hydrodesulfurization (HDS) of dibenzothiophene (DBT) showed that the presence of Ni sub(2P brought a strong promotional effect on the HDS activity, which was further confirmed by the HDS and hydrodenitrogenation (HDN) of diesel oil under industrial conditions. The enhancement in HDN activity and stability by Ni) sub(2)P addition could be attributed more to the effect of new active sites of Ni sub(2P than that of acidity modification. The as-prepared Ni) sub(2)P-NiMoW/[gamma]-Al sub(2O) sub(3) catalyst showed better hydrotreating performance than NiMoW/[gamma]-Al sub(2O) sub(3) and commercial catalysts.